1 /* 2 * OMAP4 PRM instance functions 3 * 4 * Copyright (C) 2009 Nokia Corporation 5 * Paul Walmsley 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License version 2 as 9 * published by the Free Software Foundation. 10 */ 11 12 #include <linux/kernel.h> 13 #include <linux/types.h> 14 #include <linux/errno.h> 15 #include <linux/err.h> 16 #include <linux/io.h> 17 18 #include <plat/common.h> 19 20 #include "prm44xx.h" 21 #include "prminst44xx.h" 22 #include "prm-regbits-44xx.h" 23 #include "prcm44xx.h" 24 #include "prcm_mpu44xx.h" 25 26 static u32 _prm_bases[OMAP4_MAX_PRCM_PARTITIONS] = { 27 [OMAP4430_INVALID_PRCM_PARTITION] = 0, 28 [OMAP4430_PRM_PARTITION] = OMAP4430_PRM_BASE, 29 [OMAP4430_CM1_PARTITION] = 0, 30 [OMAP4430_CM2_PARTITION] = 0, 31 [OMAP4430_SCRM_PARTITION] = 0, 32 [OMAP4430_PRCM_MPU_PARTITION] = OMAP4430_PRCM_MPU_BASE, 33 }; 34 35 /* Read a register in a PRM instance */ 36 u32 omap4_prminst_read_inst_reg(u8 part, s16 inst, u16 idx) 37 { 38 BUG_ON(part >= OMAP4_MAX_PRCM_PARTITIONS || 39 part == OMAP4430_INVALID_PRCM_PARTITION || 40 !_prm_bases[part]); 41 return __raw_readl(OMAP2_L4_IO_ADDRESS(_prm_bases[part] + inst + 42 idx)); 43 } 44 45 /* Write into a register in a PRM instance */ 46 void omap4_prminst_write_inst_reg(u32 val, u8 part, s16 inst, u16 idx) 47 { 48 BUG_ON(part >= OMAP4_MAX_PRCM_PARTITIONS || 49 part == OMAP4430_INVALID_PRCM_PARTITION || 50 !_prm_bases[part]); 51 __raw_writel(val, OMAP2_L4_IO_ADDRESS(_prm_bases[part] + inst + idx)); 52 } 53 54 /* Read-modify-write a register in PRM. Caller must lock */ 55 u32 omap4_prminst_rmw_inst_reg_bits(u32 mask, u32 bits, u8 part, s16 inst, 56 s16 idx) 57 { 58 u32 v; 59 60 v = omap4_prminst_read_inst_reg(part, inst, idx); 61 v &= ~mask; 62 v |= bits; 63 omap4_prminst_write_inst_reg(v, part, inst, idx); 64 65 return v; 66 } 67